package com.taobao.api.internal.util;

import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * 命名线程工厂。
 * 
 * @author zhenzi 2011-8-9 15:05:04
 */
public class NamedThreadFactory implements ThreadFactory {

  private static final AtomicInteger poolNumber   = new AtomicInteger(1);

  private final AtomicInteger        threadNumber = new AtomicInteger(1);
  private final ThreadGroup          group;
  private final String               namePrefix;
  private final boolean              isDaemon;

  public NamedThreadFactory() {
    this("pool-msg-consume");
  }

  public NamedThreadFactory(String name) {
    this(name, false);
  }

  public NamedThreadFactory(String preffix, boolean daemon) {
    SecurityManager s = System.getSecurityManager();
    group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup();
    namePrefix = preffix + "-" + poolNumber.getAndIncrement() + "-thread-";
    isDaemon = daemon;
  }

  public Thread newThread(Runnable r) {
    Thread t = new Thread(group, r, namePrefix + threadNumber.getAndIncrement(), 0);
    t.setDaemon(isDaemon);
    if (t.getPriority() != Thread.NORM_PRIORITY) {
      t.setPriority(Thread.NORM_PRIORITY);
    }
    return t;
  }
}
